For IPCC STUDENTS :
Advance Accounting (group 1 & 2 both) : CA Parveen Sharma (Educomp)
if self study,arrange his pirated videos and his book alongwith notes of ur Friend who has studied from him
LAW : Munish Bhandari (bright tutorials)
if self study his book is sufficient
AUDIT : Surbhi Bansal (Bright Tutorials),
for self study,her book is sufficient
IT-SM : Dinesh Madaan(Educomp),
For self study,his book is sufficient
Another option is R M JHA (Bright Tutorials)
Costing & FM: I ve no idea about it...for self study R K Mehta's notes are good...u can also refer Khan-Jain of Tata Mcgrall
Tax: Ajay Jain is awesome.......another Teacher Mr.Gandhi is good.......for self study,refer Taxmann Singhania's Book or Ajay Jain's Book alongwith question and answer book wich is easily available in market